This past weekend’s health scares to two NFL coaches – the Denver Broncos’ John Fox and the Houston Texans’ Gary Kubiak – have sparked conversation and contemplation about the rigors of their job. Last November, Jim Harbaugh’s own health crisis sparked similar concerns.

Harbaugh had an irregular heartbeat treated last Nov. 15 through a cardioversion procedure at Stanford Hospital. Aside from missing barely a day’s work, Harbaugh resumed his duties and guided the 49ers to Super Bowl XLVII.

A year later, Harbaugh remains as lively as ever, especially on the sideline. Presumably, only he and his doctors know how healthy he is, but he looks — and sounds — in top shape.

Sound bites from a mic’d-up Harbaugh illustrated just how intense he coached the 49ers in their last game, a 42-10 victory over the Jacksonville Jaguars in London on Oct. 27.

“… We have got to get the tempo going! HEY! Come here! Hey guys, we’ve got to get the tempo going! …. Great throw Kap! Nicely done. … It’s on the ground! It’s on the ground! It’s on the ground!”

Harbaugh said last year, following his outpatient surgery, that his sideline style wouldn’t change. His exuberant actions have remained as status quo as his attire (see: black sweatshirt, khaki pants). In practice and in pre-game, Harbaugh continues to be very involved, from throwing passes to jogging between drills.

A year ago, doctors advised him to alter his diet and cut down on caffeine. Whether or not he’s still following those orders, he is still following his old routine in one facet: winning. The 49ers take a 6-2 record and a five-game win streak into Sunday’s home game against the Carolina Panthers, the team where Harbaugh concluded his 15-year playing career as a 2001 backup.

The Broncos and Texans should hope their coaches return in similarly vivacious capacities. Fox underwent heart-valve surgery Monday after becoming light-headed while golfing Saturday near his Charlotte, N.C. home. Kubiak collapsed on the field at halftime of Sunday night’s game, and he was evaluated overnight at a Houston hospital for possible stroke-like symptoms.